The term is archaic, calling upon the ancient language of the magi, and those versed in the eldritch arts. In the more vulgar argot, terms such as scrying room and equally mundane names are bandied about. The fact that such limited terms are used to describe the proper mystic's psychomanteum demonstrates how little they actually know about what occurs within.

Captain Aubrey surveyed the deck of the captured sloop. He was
amazed that such well run ship could crewed by such a motley gang of
men. He turned to the doctor and wondered, "No man is born into piracy.
What were these many fellows before they took up the black flag?
Surely they can not all share the same story."